Pump.



G. M. SMITH.

PUMP. APPLICATION FILED APR. 26, 1909.

Patented Nov. 8, 1910.

3 SHEETSSHEET 2.

WITNESSES A TTOR/VE Y8 1-HE NORRIS PETERS co.. wAsnuvcrorv, D. c

0. SMITH. PUMP.

APPLICATION FILED APE.26, 1909. I

974,837. I Patented Nov. 8, 1910'.

3 SHEETS-SHEET 3.

WITNESSES l/VI/E/VTOR I C assz'acy J/Z 82121272 ATTOR/VE Y8 m1 MamasPETERS co., gmsumcmm n.

GASSIUS 1VL SMITH, 0F LOS ANGELES, CALIFORNIA.

PUMP.

To all whom it may concern:

Be it known that I, CAssIUs M. SMITH, a citizen of the United States,and resident of the city of Los Angeles, county of Los Angeles, State ofCalifornia, have invented a certain new and useful Pump, of which thefollowing is a full description.

The principal objects which this invention has in view are to produce apump which may be operated as a single acting or as a double actingpump; to provide a pump which may be operated by man, horse or enginepower at will; to provide a pump wherein the flow is even and continuouswithout pulsation or break; and to provide a plunger lead whereby thereis no suspension of the lifting action.

In the drawings :Figure l is a vertical section of a pump mechanismconstructed in accordance with this invention; the pulleys and wheelsbeing shown in full lines. Fig. 2 is a plan view of the mechanism shownin Fig. 1. Fig. 3 is a diagrammatic view of the path of the cams. Fig.at is a vertical section of the pumping mechanism constructed inaccordance with this invention, the pulleys and wheels being shown infull lines, the construction being a modification of that shown in Fig.1.

The pump casing 2 is provided with the head 3. The head 3- is connectedto the delivery pipe -4-, which leads to any suitable point of delivery.The cap 5- is recessed to receive the boss of the disk -6. Between thedisk 6 and the cap -5 is formed the stuffing box 7. The hollow pump rod-8 passes through the stufling box 7 to the upper plunger of the doubleacting pump at the bottom of the casing 2--. It is within the hollow rod-8- that the solid rod 9 is mounted. The rod -9- is connected with thelower plunger of the pump. here the rod 9- passes out of the rod 8-- astuffing box 10 is formed. The well casing -2 extends within thefoundation walls -11. On the crown of these walls are laid heavy woodsills -12. Upon the sills 12- are mounted the bearing bracle ets 13which form the bearings 14. for the shaft of the rollers -1!-. Therollers 15- are fixedly mounted on the shaft 16. In the constructionshown in the drawings there are three such rollers and their mountings.The fourth roller 17 is loosely mounted on the shaft Specification ofLetters Patent.

Application filed April 26, 1909.

Patented Nov. 8, 1910.

Serial No. 492,283.

18 and forms the fourth bearing for the table 19. The bull wheel ortable 19 is a large ring on the under face of which beyond the path ofthe rollers -15 and 17 is provided the gear toothed section 20, which isengaged with the pinion 21. The pinion 21 is fixedly mounted on theshaft 1S. The shaft 18 is car ried in bearings formed in the bearingbrackets -22 and is provided on the outer end with a fixed driving beltpulley 23-.

Upon the table -19 is mounted the cam track by which the rods 8 and 9are reciprocated. The cam track -24.- is platted to the shapesubstantially as shown in Fig. 3 of drawings. The distance between thelowermost level and the highest level of the cam is the measure of thestroke of the rods 8 and 9. To the rod 8- is secured the yoke -25-. Theyoke 25 is V shaped, the center portion being depressed below the levelof the lowest portion of the track Qta distance slightly more than therise of the highest point of said track above said lowest level. Thecause for this shape of the yoke'25 is that it' is by these means thatthe said yoke avoids the yoke 26 which carries the pump rod 9 The yoke26- is straight, as shown in Fig. 2 of the drawings. Both yokes -25 and-26 are provided with, and carried by the rollers 27. The rollers 27 areflanged to maintain them on the track 24L.

It will be observed that if the yokes 25 and 26 are held against rotarymotion, while the table -19- is rotated, the wheels -27 carrying theyokes 25 and -26- must be first raised the full height of the cam track24-, and then lowered to the lowest portion of the same. The high pointson the cam track are accurately and oppositely disposed, and the wheels27 on both yokes are maintained horizontally level. In every completerotation of the table -19- the yokes 25 and 26 are raised twice.

To insure alternation in the reciprocation of the rods 8 and 9 the yokes-25- and 26 are diametrically oppositely disposed. By this arrangement,when the yoke 25- is at its lowest position, and with it the rod 8 atits lowest position, the yoke 26 is at the highest point of the liftingaction of the said yoke. From this point the two yokes reverse theirpositions, the

yoke --25 being carried to the top of its stroke and to the top of thecam track -2t, while the yoke -26 is depressed to the lowest part of thetrack .2L and of its stroke.

The action thus far described is compelled by restraining the yokes -Q5and 26 from rotary action. Many ways may be provided for accomplishingthis. That shown in the drawings consists in placing a standard 29 uponthe base plates -'-30 that carry the brackets 13 and -'22 forming thebearings for the wheels -15- and l7-. The yokes 25 and 26 are connectedto the standards -29 by the lead rods -3131. The standards 29 which areconnected to the yokes are disposed in rear of the yoke to which each isconnected. It thereby receives the strain of the said yoke where movedby the track 24. The lead rods 31- are pivotally mounted at 32- on thecollars 33. The standards --29 carry rollers Q9 which serve to hold thetable 19- in place to prevent lateral movement. The collars 33 areadjustable on the standards 29- by means of the adjustment rings 34-.That end of the lead rods 31- which is removed from the collar --33 hasa ball shaped end. These ball shaped ends extend into sockets 35 whichpermit a flexible action of the joint. The object in thus mounting therods 3131 is to permit the yokes 25 and 26 a certain amount of rotaryswing. In the construction shown in the drawings there is about 5% ofthis swing.

A desired result in double acting pumps is to produce a lead in theplunger which is starting on its up stroke. In the present inventionthis result is produced by the arrangement of the lead rods 31 upon thestandards 29. As the rings 34lare raised above the median line of theswing of the said lead rods the distance between the collar 33- and thelow portions of the track is greater than between. the said collar andthe high portions of the track. The rods 31 being constant in lengththis is compensated for by the rods 31. pushing the yokes from the saidstandards, or drawing the yokes toward the same. Thus when a yoke is atits lowest point on the track 24 the arms -31 draw the end of the yoketoward the standard 29, to compensate for the diiference in thedistance. In practice the result of this construction is to quickly drawthe yoke which is at, or approaching, the lowest extreme of its stroke,in a rotary direction and in starting it on the upward incline of thecam track 24.--. Simultaneously the yoke which is approaching thehighest point of the track (which is near the level of the collar 33) isbeing forced away from the standard, and thereby retarded in its travelover the cam track -9A. The dual action has the effect of withholdingthe one yoke from beginning the descending stroke, while advancing theother yoke upon its ascending stroke. By this means the lifting impulseis constantly maintained on the column of rising water. At no time isthere a period when the two pl'ungers are simultaneously at rest ordescending. This construction avoids pulsations or water hammers in thecasing 2-. The above described construction is sometimes replaced by aconstruction using the rods 29 as fender rods. These rods are preferablybent, as shown in Fig. 4 of the drawings, to produce the action wherebythe plunger rod to which the yokes are attached are slightly rotated,sufliciently to prolong the period of the wheels 27 rising to the fullheight of the cams 24. The period of the fall of the said yokes isobviously shortened in direct proportion as the period of the rise islengthened.

IVhile I have shown the use of the two rods 29, 29 secured at the top bycross braces 29, it will be understood that one of the said rods (thatnot receiving the thrust or push of the moving cams) may be dispensedwith. The action, however, is improved by the use of the two rods,between which the roller 31 is hold.

A further modification of the structure just described is sometimesemployed by me. This modification consists in straightening the verticalrod 29, controlling the rise and 100 fall of the yoke to a verticalpath. The cams 24 are shaped to produce, on what may be termed therising side of the cam, a long side, and on the falling side of the cam,a short side. The inclinations of these sides 10 necessarily differ.They form operative periods of different durations, the falling periodbeing subsequently shorter than the rising period, as is seen in Fig. 3of the drawings.

The result of these various constructions is that the lifting or upwardstroke of each of the yokes and plunger rod connected therewith, startsin advance of the beginning of the falling stroke of the companion 115yoke and plunger rod.

The track 24. is supported by the stanchions 3(3. 011 the following sideof the cam track 24 the stanchions 36- are extended to support theoverhead guard 129 rail 28 which is provided to force the yokes downshould they hesitate. or should the rods 8 and 9 be held in theirbearings, thus making the action of the said rods mechanically morepositive.

lVhile I have herein described and shown this invention as arranged tobe operated by motor power, it is evident that the table l9 could beprovided with suitable sweeps, to which horses might be harnessed 130and the table rotated. l/Vhen thus constructed the pulley 23 and pinion21 are prefer the form wherein the latter half ofv the cam is so shapedas to produce a sharper angle for the drop of the yokes than for therise of the same. The shape of the following or rear half of the cam Iprefer to form substantially as shown in Fig. 3 of drawings.

Having thus described this invention, what is claimed is 1. A pumpcomprising a plurality of plungers and pump rods connected therewith; areciprocating mechanism embodying a series of cams mounted on a rotarymember to extend under the said rods to lift the same successively;suitable means for rotating the said rotary member; and means forshifting the said rods in the path of the said cams to alter thesynchronized action of the rods.

2. A pump comprising a plurality of plungers and pump rods connectedtherewith; a rotary member having a series of cams formed thereon;suitable means for rotating said rotary member; connecting devices forconnecting the said rods with the said cams and in successivearrangement thereon; and suitable means for shifting the said connectingdevices on the said cams in the rotary path thereof.

3. A pump comprising a plurality of plungers and pump rods connectedtherewith; a rotary member mounted horizontally and concentric with saidrods, said ro-. tary member having a series of vertically ex tended camsurfaces formed thereon; suitable means for rotating said rotary member;a plurality of laterally extended arms each connected with one of thesaid rods, said arms being adapted to ride on the said cams; and meansfor rotating the said arms about the said rods to change the relation ofeach of the said arms to the said cams at predetermined times inrelation to the rise and fall of said rods.

4:. A pump comprising a plurality of plungers and pump rods connectedtherewith; a rotary member mounted horizontally and concentric with saidrods and having a series of vertically extended cams; suitable means forrotating said rotary mem ber; laterally extended arms each connectedwith one of the said rods, said arms being adapted to ride on said cams;and means for moving the said arms on their vertical axes during thelift of the said rodsand in the direction of the travel of said rotarymember to retard the movement of the said rods at a predetermined periodin their lift.

5. A pump comprising a plurality of plungers and pump rods connectedtherewith; a rotary member mounted horizontally and concentric with saidrods and having a series of vertically extended cams; suitable means forrotating said rotary member; laterally extended arms connected to saidrods and adapted to ride on said cams; a stationary frame structure;hinged arms connecting the said laterally extended arms with thestationary structure; and vertically adjustable connections for saidhinged arms with said structure.

6. A pump comprising a plurality of plungers and pump rods connectedtherewith; a rotary member mounted horizontally and concentric with saidrods; a series of cams vertically extended from said rotary member;suitable means for rotating said member; laterally extended arms eachconnected to one of the said rods and adapted to ride on the said cams,said arms being formed to avoid each the other in their operation; astationary frame structure; hinged connections flexibly attached to thesaid arms and the stationary structure; and means for adjustingvertically the stationary end of the hinged connections.

7 A pump comprising two plungers and two pump rods one within the other,said rods being connected to said plungers in suitable arrangement; twolaterally extended arms each connected to one of the said rods, andbowed at the center to permit the extremities of said arms to pass indiflerent planes; a stationary frame structure; swinging connectionsbetween the said arms and stationary structure adapted to maintain saidarms at substantially an angle of 90 degrees each from the other; arotary member mounted horizontally and concentric with said rods; twovertically extended cam surfaces mounted on said member arranged at theextremes of one diameter thereof and adapted to carry the said laterallyextended arms; and suitable means for rotating the said rotary member.

8. A pump comprising a plurality of plungers and pump rods connectedtherewith; a plurality of laterally extended arms each connected withone of the said rods; a rotary member having a series of cams formedthereon and adapted to raise and lower the said arms in relativelyaccelerated and retarded time periods; and guide members for said armsmounted to control the path of the rise and fall of the ends of the saidarms.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CASSIUS M. SMITH.

Witnesses:

ARTHUR Gr. BAKER, F. M. BALLARD.

